Using an indoor outdoor rug will save you a lot of headaches for accidents that may occur.
What shape rug under round table.
Or a 9 x 11 rectangle would be the smallest.
For a round rug under a round table place the table in the center.
If there is a leaf for the table making it oval a rectangular rug can also be used.
You need about 24 or a little less for each chair to be pulled out for seating.
I have a very small area about 7x9 to work in.
The clean lines of a square rug however tie in with boxy chairs or a modern chandelier with.
Is it possible to put a rectangular rug under the table.
With a square or rectangular rug in a large room center or off set the table to fit the room.
In that case rectangle position the chairs so they back up towards the corners of the rug.
You can sometimes get away with 24 that means a 9 10 foot round rug.
The guideline is that the rug should be 30 wider than the table on every side so the chairs don t fall off when pulled out.
Than you may want or may need a rectangular shaped rug or a round shaped rug.
As for rug shape a round rug visually coordinates with a round table and curvy chairs for example.